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REGULATORY FRAMEWORK - FFSU - Impact in the Company (Details) - ARS ($) $ in Millions	Dec. 31, 2017	Oct. 01, 2012	Sep. 13, 2012	Mar. 31, 2011	Jan. 31, 2011
Regulatory framework
Unrecorded accounts receivable	$ 2,925
Investments included in the unrecorded accounts receivable	2,691
Deductions included in the unrecorded accounts receivable	1,033
Deposit payable, as required by the CNC			$ 208
Personal
Regulatory framework
Deposits with the Bank, SU					$ 112
Investment amount of the project for the development of a network infrastructure in locations in the Northern Region of Argentina with no mobile coverage				$ 70
Deposits with the CNC, under protest		$ 23
SU Fund Administrative Appeals | Minimum
Regulatory framework
Net assets (liabilities)	(799)
SU Fund Administrative Appeals | Maximum
Regulatory framework
Net assets (liabilities)	$ 2,925

X

- Definition

The amount of assets less the amount of liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 1
-IssueDate 2017-01-01
-Paragraph IG63
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=1&date=2017-03-01&anchor=para_IG63&doctype=Implementation%20Guidance
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

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- Definition

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+ References

No definition available.

+ Details

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- Definition

Represents the amount of deposit liability, as required by the Argentine National Communications Commission (CNC).

+ References

No definition available.

+ Details

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- Definition

Represents the amount of deposit under protest with the Argentine National Communications Commission (CNC).

+ References

No definition available.

+ Details

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- Definition

Represents the amount of deposit with the banks.

+ References

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+ Details

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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X

- Definition

Represents the amount of investments in high-cost areas included in the unrecorded accounts receivable.

+ References

No definition available.

+ Details

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X

- Definition

Represents the amount of investment in the project for the development of a network infrastructure in locations in the Northern Region of Argentina with no mobile coverage.

+ References

No definition available.

+ Details

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- Definition

Represents the amount of the estimated accounts receivable yet to be recorded.

+ References

No definition available.

+ Details

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- Details

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- Details

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